Bradley Cooper went commando at President Obama's White House dinner

Bradley Cooper has revealed that he went commando when meeting President Obama at a White House dinner earlier this month.

The Oscar-nominated actor is currently gaining weight for an upcoming role, and realized while he was getting ready for the dinner that his trousers no longer fitted him.

Cooper, who had gained 15lb in just one month, revealed on Monday's Ellen DeGeneres Show: "I'm getting dressed ten minutes before I was supposed to go and literally the pants go up to here and I just started laughing, this is hilarious - I'm going to meet the President!

"So I had to go commando, number one, because there was no room at all, I had to."

The Silver Linings Playbook actor also revealed that he still hadn't decided who he was going to take as his date to the Oscars ceremony next month, where he is nominated for an Academy Award for his role in American Hustle.

Nominees are only permitted to take one date, with the star saying that it was between his sister and his mother, making no mention of his girlfriend Suki Waterhouse.